# Properties

 Label 260.2.a.b Level $260$ Weight $2$ Character orbit 260.a Self dual yes Analytic conductor $2.076$ Analytic rank $0$ Dimension $3$ CM no Inner twists $1$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [260,2,Mod(1,260)]

mf = mfinit([N,k,chi],0)

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(260, base_ring=CyclotomicField(2))

chi = DirichletCharacter(H, H._module([0, 0, 0]))

N = Newforms(chi, 2, names="a")

//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code

chi := DirichletCharacter("260.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$260 = 2^{2} \cdot 5 \cdot 13$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 260.a (trivial)

## Newform invariants

comment: select newform

sage: f = N[0] # Warning: the index may be different

gp: f = lf[1] \\ Warning: the index may be different

 Self dual: yes Analytic conductor: $$2.07611045255$$ Analytic rank: $$0$$ Dimension: $$3$$ Coefficient field: 3.3.564.1 comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{3} - x^{2} - 5x + 3$$ x^3 - x^2 - 5*x + 3 Coefficient ring: $$\Z[a_1, a_2, a_3]$$ Coefficient ring index: $$2$$ Twist minimal: yes Fricke sign: $$-1$$ Sato-Tate group: $\mathrm{SU}(2)$

## $q$-expansion

comment: q-expansion

sage: f.q_expansion() # note that sage often uses an isomorphic number field

gp: mfcoefs(f, 20)

Coefficients of the $$q$$-expansion are expressed in terms of a basis $$1,\beta_1,\beta_2$$ for the coefficient ring described below. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + (\beta_{2} + 1) q^{3} + q^{5} + ( - \beta_1 - 1) q^{7} + (\beta_1 + 4) q^{9}+O(q^{10})$$ q + (b2 + 1) * q^3 + q^5 + (-b1 - 1) * q^7 + (b1 + 4) * q^9 $$q + (\beta_{2} + 1) q^{3} + q^{5} + ( - \beta_1 - 1) q^{7} + (\beta_1 + 4) q^{9} + ( - \beta_{2} + \beta_1) q^{11} + q^{13} + (\beta_{2} + 1) q^{15} - 2 \beta_{2} q^{17} + ( - \beta_{2} - \beta_1 + 2) q^{19} + ( - 2 \beta_{2} - 2 \beta_1 - 4) q^{21} + (\beta_{2} - 3) q^{23} + q^{25} + (2 \beta_{2} + 2 \beta_1 + 4) q^{27} + ( - \beta_1 + 3) q^{29} + ( - \beta_{2} + \beta_1 - 4) q^{31} + (2 \beta_{2} + \beta_1 - 3) q^{33} + ( - \beta_1 - 1) q^{35} + ( - 2 \beta_{2} + \beta_1 - 1) q^{37} + (\beta_{2} + 1) q^{39} + 2 \beta_{2} q^{41} + ( - \beta_{2} - 1) q^{43} + (\beta_1 + 4) q^{45} + (\beta_1 - 3) q^{47} + (4 \beta_{2} + 9) q^{49} + (2 \beta_{2} - 2 \beta_1 - 12) q^{51} + (2 \beta_{2} - 2 \beta_1 - 6) q^{53} + ( - \beta_{2} + \beta_1) q^{55} + (2 \beta_{2} - 3 \beta_1 - 7) q^{57} + ( - 3 \beta_{2} + \beta_1 - 6) q^{59} + (\beta_1 + 5) q^{61} + ( - 4 \beta_{2} - 3 \beta_1 - 19) q^{63} + q^{65} + (2 \beta_{2} - \beta_1 + 5) q^{67} + ( - 4 \beta_{2} + \beta_1 + 3) q^{69} + ( - \beta_{2} + \beta_1) q^{71} + ( - 2 \beta_{2} + 3 \beta_1 + 5) q^{73} + (\beta_{2} + 1) q^{75} + ( - 2 \beta_{2} + 2 \beta_1 - 12) q^{77} + ( - 2 \beta_{2} + 2) q^{79} + (4 \beta_{2} + 3 \beta_1 + 10) q^{81} + ( - 4 \beta_{2} + \beta_1 - 3) q^{83} - 2 \beta_{2} q^{85} + (2 \beta_{2} - 2 \beta_1) q^{87} + (4 \beta_{2} - 2 \beta_1) q^{89} + ( - \beta_1 - 1) q^{91} + ( - 2 \beta_{2} + \beta_1 - 7) q^{93} + ( - \beta_{2} - \beta_1 + 2) q^{95} + ( - 2 \beta_1 + 8) q^{97} + ( - \beta_{2} + \beta_1 + 12) q^{99}+O(q^{100})$$ q + (b2 + 1) * q^3 + q^5 + (-b1 - 1) * q^7 + (b1 + 4) * q^9 + (-b2 + b1) * q^11 + q^13 + (b2 + 1) * q^15 - 2*b2 * q^17 + (-b2 - b1 + 2) * q^19 + (-2*b2 - 2*b1 - 4) * q^21 + (b2 - 3) * q^23 + q^25 + (2*b2 + 2*b1 + 4) * q^27 + (-b1 + 3) * q^29 + (-b2 + b1 - 4) * q^31 + (2*b2 + b1 - 3) * q^33 + (-b1 - 1) * q^35 + (-2*b2 + b1 - 1) * q^37 + (b2 + 1) * q^39 + 2*b2 * q^41 + (-b2 - 1) * q^43 + (b1 + 4) * q^45 + (b1 - 3) * q^47 + (4*b2 + 9) * q^49 + (2*b2 - 2*b1 - 12) * q^51 + (2*b2 - 2*b1 - 6) * q^53 + (-b2 + b1) * q^55 + (2*b2 - 3*b1 - 7) * q^57 + (-3*b2 + b1 - 6) * q^59 + (b1 + 5) * q^61 + (-4*b2 - 3*b1 - 19) * q^63 + q^65 + (2*b2 - b1 + 5) * q^67 + (-4*b2 + b1 + 3) * q^69 + (-b2 + b1) * q^71 + (-2*b2 + 3*b1 + 5) * q^73 + (b2 + 1) * q^75 + (-2*b2 + 2*b1 - 12) * q^77 + (-2*b2 + 2) * q^79 + (4*b2 + 3*b1 + 10) * q^81 + (-4*b2 + b1 - 3) * q^83 - 2*b2 * q^85 + (2*b2 - 2*b1) * q^87 + (4*b2 - 2*b1) * q^89 + (-b1 - 1) * q^91 + (-2*b2 + b1 - 7) * q^93 + (-b2 - b1 + 2) * q^95 + (-2*b1 + 8) * q^97 + (-b2 + b1 + 12) * q^99 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$3 q + 2 q^{3} + 3 q^{5} - 2 q^{7} + 11 q^{9}+O(q^{10})$$ 3 * q + 2 * q^3 + 3 * q^5 - 2 * q^7 + 11 * q^9 $$3 q + 2 q^{3} + 3 q^{5} - 2 q^{7} + 11 q^{9} + 3 q^{13} + 2 q^{15} + 2 q^{17} + 8 q^{19} - 8 q^{21} - 10 q^{23} + 3 q^{25} + 8 q^{27} + 10 q^{29} - 12 q^{31} - 12 q^{33} - 2 q^{35} - 2 q^{37} + 2 q^{39} - 2 q^{41} - 2 q^{43} + 11 q^{45} - 10 q^{47} + 23 q^{49} - 36 q^{51} - 18 q^{53} - 20 q^{57} - 16 q^{59} + 14 q^{61} - 50 q^{63} + 3 q^{65} + 14 q^{67} + 12 q^{69} + 14 q^{73} + 2 q^{75} - 36 q^{77} + 8 q^{79} + 23 q^{81} - 6 q^{83} + 2 q^{85} - 2 q^{89} - 2 q^{91} - 20 q^{93} + 8 q^{95} + 26 q^{97} + 36 q^{99}+O(q^{100})$$ 3 * q + 2 * q^3 + 3 * q^5 - 2 * q^7 + 11 * q^9 + 3 * q^13 + 2 * q^15 + 2 * q^17 + 8 * q^19 - 8 * q^21 - 10 * q^23 + 3 * q^25 + 8 * q^27 + 10 * q^29 - 12 * q^31 - 12 * q^33 - 2 * q^35 - 2 * q^37 + 2 * q^39 - 2 * q^41 - 2 * q^43 + 11 * q^45 - 10 * q^47 + 23 * q^49 - 36 * q^51 - 18 * q^53 - 20 * q^57 - 16 * q^59 + 14 * q^61 - 50 * q^63 + 3 * q^65 + 14 * q^67 + 12 * q^69 + 14 * q^73 + 2 * q^75 - 36 * q^77 + 8 * q^79 + 23 * q^81 - 6 * q^83 + 2 * q^85 - 2 * q^89 - 2 * q^91 - 20 * q^93 + 8 * q^95 + 26 * q^97 + 36 * q^99

Basis of coefficient ring in terms of a root $$\nu$$ of $$x^{3} - x^{2} - 5x + 3$$ :

 $$\beta_{1}$$ $$=$$ $$2\nu - 1$$ 2*v - 1 $$\beta_{2}$$ $$=$$ $$\nu^{2} - 4$$ v^2 - 4
 $$\nu$$ $$=$$ $$( \beta _1 + 1 ) / 2$$ (b1 + 1) / 2 $$\nu^{2}$$ $$=$$ $$\beta_{2} + 4$$ b2 + 4

## Embeddings

For each embedding $$\iota_m$$ of the coefficient field, the values $$\iota_m(a_n)$$ are shown below.

For more information on an embedded modular form you can click on its label.

comment: embeddings in the coefficient field

gp: mfembed(f)

Label   $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
1.1
 0.571993 −2.08613 2.51414
0 −2.67282 0 1.00000 0 −1.14399 0 4.14399 0
1.2 0 1.35194 0 1.00000 0 4.17226 0 −1.17226 0
1.3 0 3.32088 0 1.00000 0 −5.02827 0 8.02827 0
 $$n$$: e.g. 2-40 or 990-1000 Significant digits: Format: Complex embeddings Normalized embeddings Satake parameters Satake angles

## Atkin-Lehner signs

$$p$$ Sign
$$2$$ $$-1$$
$$5$$ $$-1$$
$$13$$ $$-1$$

## Inner twists

This newform does not admit any (nontrivial) inner twists.

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 260.2.a.b 3
3.b odd 2 1 2340.2.a.n 3
4.b odd 2 1 1040.2.a.o 3
5.b even 2 1 1300.2.a.i 3
5.c odd 4 2 1300.2.c.f 6
8.b even 2 1 4160.2.a.bo 3
8.d odd 2 1 4160.2.a.br 3
12.b even 2 1 9360.2.a.da 3
13.b even 2 1 3380.2.a.o 3
13.d odd 4 2 3380.2.f.h 6
20.d odd 2 1 5200.2.a.ci 3

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
260.2.a.b 3 1.a even 1 1 trivial
1040.2.a.o 3 4.b odd 2 1
1300.2.a.i 3 5.b even 2 1
1300.2.c.f 6 5.c odd 4 2
2340.2.a.n 3 3.b odd 2 1
3380.2.a.o 3 13.b even 2 1
3380.2.f.h 6 13.d odd 4 2
4160.2.a.bo 3 8.b even 2 1
4160.2.a.br 3 8.d odd 2 1
5200.2.a.ci 3 20.d odd 2 1
9360.2.a.da 3 12.b even 2 1

## Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator $$T_{3}^{3} - 2T_{3}^{2} - 8T_{3} + 12$$ acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(260))$$.

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{3}$$
$3$ $$T^{3} - 2 T^{2} + \cdots + 12$$
$5$ $$(T - 1)^{3}$$
$7$ $$T^{3} + 2 T^{2} + \cdots - 24$$
$11$ $$T^{3} - 24T + 36$$
$13$ $$(T - 1)^{3}$$
$17$ $$T^{3} - 2 T^{2} + \cdots - 24$$
$19$ $$T^{3} - 8 T^{2} + \cdots + 164$$
$23$ $$T^{3} + 10 T^{2} + \cdots + 12$$
$29$ $$T^{3} - 10 T^{2} + \cdots + 24$$
$31$ $$T^{3} + 12 T^{2} + \cdots + 4$$
$37$ $$T^{3} + 2 T^{2} + \cdots - 72$$
$41$ $$T^{3} + 2 T^{2} + \cdots + 24$$
$43$ $$T^{3} + 2 T^{2} + \cdots - 12$$
$47$ $$T^{3} + 10 T^{2} + \cdots - 24$$
$53$ $$T^{3} + 18 T^{2} + \cdots - 648$$
$59$ $$T^{3} + 16T^{2} - 564$$
$61$ $$T^{3} - 14 T^{2} + \cdots + 8$$
$67$ $$T^{3} - 14 T^{2} + \cdots + 152$$
$71$ $$T^{3} - 24T + 36$$
$73$ $$T^{3} - 14 T^{2} + \cdots + 1784$$
$79$ $$T^{3} - 8 T^{2} + \cdots + 32$$
$83$ $$T^{3} + 6 T^{2} + \cdots - 936$$
$89$ $$T^{3} + 2 T^{2} + \cdots + 216$$
$97$ $$T^{3} - 26 T^{2} + \cdots + 8$$